About a year ago, the AC on our Duramax started blowing cold all the time and regardless if the switch was on or off. Looking under the hood, I could see that the compressor was always engaged and clearly, that was the reason for it. Assuming it was just a bad relay, I replaced it and the problem persisted and the only way to get it to disengage was to pull the fuse. And, being that I'm a busy guy, that's what I did and didn't give it another thought, especially with the cooler months coming.
Fast forward to a year later and I finally decide to take it into the dealership and have it looked at, twice because they didn't do shit the first time and long story short, this is what they found.
Underneath the fuse box, some mice made themselves a home and you guessed it, started chewing through the wires.
Apparently, a few were so bad that they were literally still attached by a couple of strands. The service advisor was amazed that our truck was running at all and even more so that we weren't at least throwing codes.
Turns out that the relay control circuit was grounded out and that was causing the compressor to be engaged all the time and repairing the wires got everything working again.
The biggest problem is that this isn't the first time we've had mice problems and it's not from leaving our rigs parked for extended periods of time. We've had mice under the hood of our 392 and just from a single visit to our ranch. Total pain in the ass.
Fast forward to a year later and I finally decide to take it into the dealership and have it looked at, twice because they didn't do shit the first time and long story short, this is what they found.
Underneath the fuse box, some mice made themselves a home and you guessed it, started chewing through the wires.
Apparently, a few were so bad that they were literally still attached by a couple of strands. The service advisor was amazed that our truck was running at all and even more so that we weren't at least throwing codes.
Turns out that the relay control circuit was grounded out and that was causing the compressor to be engaged all the time and repairing the wires got everything working again.
The biggest problem is that this isn't the first time we've had mice problems and it's not from leaving our rigs parked for extended periods of time. We've had mice under the hood of our 392 and just from a single visit to our ranch. Total pain in the ass.
